TABLE C-l 



ACOUSTICAL EQUIPMENT 



Transmitting Hydrophones 



F requency 



Serial Number 



3000 cps 



B40CR6M 



1300 cps 



B38CR8M 



700 cps 



B38CR8M 



Receiving Hydroph 



ones 





Serial Number 



Channel 1 



B47CRT69 



Shallow 





Channel 2 



B47CRT51M 



Intermediate 





Channel 3 



B47CRT7M 



Deep 





Sensitivity 



100 db re 1 pb/amp at 1 meter 

 94.5 db re 1 pb/amp at 1 meter 

 76.5 db re 1 Mb /amp at 1 meter 



Sensitivity 



3000 cps - 

 1300 cps - 



700 cps - 

 3000 cps - 

 1300 cps - 



700 cps - 

 3000 cps - 

 1300 cps - 



700 cps - 



116 db re 

 115 db re 

 115 db re 



117 db re 



115 db re 



116 db re 

 120 db re 

 116 db re 

 115 db re 



1 pv/pbar 

 1 pv/pbar 

 1 pv/pbar 

 1 pv/pbar 

 1 pv/ubar 

 1 pv/ubar 

 1 pv/pbar 

 1 uv/ubar 

 1 uv/ubar 



C-2 



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